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There is a lot of fudge room on the plugs. How many of our BN1 and 2's out =
there are still at factory specs. Our BN2 has nearly flat top pistons which=
bump the compression, yours may have electronic ignition or=C2=A0 a specia=
l coil, cam, carbs of something else. Most likely a large number of the car=
s are not even tuned to get a clean burn. The plugs give you a reading on w=
hat is going on inside the combustion chamber. Sometimes a factory recommen=
dation is not the best choice.=C2=A0That said the N5C plugs in our BN2 seem=
to work well.=C2=A0Perry
-----Original Message-----
From: Bob Spidell <bspidell@comcast.net>
To: Bob Haskell <rchaskell@earthlink.net>; healeys@autox.team.net
Sent: Mon, Feb 1, 2021 10:51 am
Subject: Re: [Healeys] Spark Plugs
Since we're on the topic--sorta, we now know what the 'official' plug=20
recommendation was/is--what do the numbers mean? An N5C is a 'hotter'=20
plug than an N3C, but what are the real world ramifications for, say, an=20
old Healey 4-banger? As I mentioned, I have the N5C in my BN2, and they=20
seem to work fine; presumably, they run hotter than the N3Cs, but what=20
does that do for performance, etc.? I know hotter plugs are sometimes=20
suggested for engines that burn a lot of oil, but do they cause the=20
engine to run a bit hotter? What if I dropped an alloy head on my 100's=20
engine, would I want to run a colder plug?
In aircraft piston engines that still run on heavily-leaded fuel,=20
residual lead can foul plugs quickly; for problematic engines, a 'fine=20
wire' plug is sometimes used (just like it sounds, these plugs have=20
smaller center electrodes that are less likely to harbor unburned=20
elemental lead).
On 2/1/2021 3:25 AM, Bob Haskell wrote:
> Bob,
>
> Looks like NA8 were replaced by N5C.=C2=A0 But if you're looking for=20
> originality:
>
> https://www.ebay.com/itm/3-NOS-Champion-NA8-Black-Body-Spark-Plugs-Austin=
-Healey-100-4-Jaguar-XK120-MG-TD/393094267661=20
>
>
> Cheers,
>
> Bob Haskell
> Austin Healey 3000 BN7/BT7 registrar
>
> On 1/31/21 6:48 PM, Bob Spidell wrote:
>> We are running Champion N3C in our BN2; they work well.
>>
>> The shop manual calls for Champion NA.8 (whatever those are):
>>
>>
>>
>> On 1/27/2021 1:16 PM, Michael MacLean wrote:
>>> Not to get too far off the subject about Healeys, but my Harley=20
>>> Davidson (30s technology like our cars) runs the best on the=20
>>> cheapest Ford Autolite 4164 copper plugs.=C2=A0 I tried "high=20
>>> performance" plugs from Harley Davidson and saw no difference.=C2=A0 Be=
st=20
>>> of all they are only 89 cents a piece when on sale and I only need=20
>>> two at a time.=C2=A0 Does anyone know for sure which Champion plug work=
s=20
>>> for the BN2?
>>> Mike MacLean
>>>
>>> On Wednesday, January 27, 2021, 10:18:57 AM PST, Kees Oudesluijs=20
>>> <coudesluijs@chello.nl> wrote:
>>>
>>>
>>> Never had much problems with trouble because of plugs on any of my=20
>>> vehicles in the past 55 years. The only thing that is more or less=20
>>> important is to gap them, clean them once in a while and replace=20
>>> when they are to far gone. I do not think I even did that in the=20
>>> last ten years or so. I have nearly always used Champion plugs as=20
>>> they are very cheap: between =E2=82=AC8 and =E2=82=AC15 for four.
>>>
>>> I presume that electronic ignition (Pertronix in my case) may also=20
>>> help.
>>>
>>> Kees Oudesluijs
>>>
>>>
>>> Op 27-1-2021 om 18:27 schreef Laurie Wilford:
>>> I continue to use only Champion plugs in my Healeys but have=20
>>> experienced at least two episodes of plug problems over the years.=20
>>> Based on the number of miles covered that is probably not too bad,=20
>>> but the second time was with a newly installed set of plugs. One was=20
>>> defective.
>>> Both times the symptoms were intermittent missing both at idle and=20
>>> on the highway.=C2=A0 Finally changing plugs was of course one of the=
=20
>>> last things I did.
>>>
>>> Laurie Wilford
>>>
>>> Sent from my Galaxy
>>>
>>>
>>>
>>
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<div style=3D"color:black;font: 10pt Arial, Helvetica, sans-serif;">There i=
s a lot of fudge room on the plugs. How many of our BN1 and 2's out there a=
re still at factory specs. Our BN2 has nearly flat top pistons which bump t=
he compression, yours may have electronic ignition or a special coil,=
cam, carbs of something else. Most likely a large number of the cars are n=
ot even tuned to get a clean burn. The plugs give you a reading on what is =
going on inside the combustion chamber. Sometimes a factory recommendation =
is not the best choice.
<div>That said the N5C plugs in our BN2 seem to work well. </div>
<div>Perry<br>
<br>
<br>
<div style=3D"font-family:arial,helvetica;font-size:10pt;color:black">-----=
Original Message-----<br>
From: Bob Spidell <bspidell@comcast.net><br>
To: Bob Haskell <rchaskell@earthlink.net>; healeys@autox.team.net<br>
Sent: Mon, Feb 1, 2021 10:51 am<br>
Subject: Re: [Healeys] Spark Plugs<br>
<br>
<div dir=3D"ltr">Since we're on the topic--sorta, we now know what the 'off=
icial' plug <br clear=3D"none">recommendation was/is--what do the numbers m=
ean? An N5C is a 'hotter' <br clear=3D"none">plug than an N3C, but what are=
the real world ramifications for, say, an <br clear=3D"none">old Healey 4-=
banger? As I mentioned, I have the N5C in my BN2, and they <br clear=3D"non=
e">seem to work fine; presumably, they run hotter than the N3Cs, but what <=
br clear=3D"none">does that do for performance, etc.? I know hotter plugs a=
re sometimes <br clear=3D"none">suggested for engines that burn a lot of oi=
l, but do they cause the <br clear=3D"none">engine to run a bit hotter? Wha=
t if I dropped an alloy head on my 100's <br clear=3D"none">engine, would I=
want to run a colder plug?<br clear=3D"none"><br clear=3D"none">In aircraf=
t piston engines that still run on heavily-leaded fuel, <br clear=3D"none">=
residual lead can foul plugs quickly; for problematic engines, a 'fine <br =
clear=3D"none">wire' plug is sometimes used (just like it sounds, these plu=
gs have <br clear=3D"none">smaller center electrodes that are less likely t=
o harbor unburned <br clear=3D"none">elemental lead).<br clear=3D"none"><br=
clear=3D"none"><br clear=3D"none">
<div class=3D"yqt6611807189" id=3D"yqtfd46169"><br clear=3D"none">On 2/1/20=
21 3:25 AM, Bob Haskell wrote:<br clear=3D"none">> Bob,<br clear=3D"none=
">><br clear=3D"none">> Looks like NA8 were replaced by N5C. Bu=
t if you're looking for <br clear=3D"none">> originality:<br clear=3D"no=
ne">><br clear=3D"none">> <a shape=3D"rect" href=3D"https://www.ebay.=
com/itm/3-NOS-Champion-NA8-Black-Body-Spark-Plugs-Austin-Healey-100-4-Jagua=
r-XK120-MG-TD/393094267661" target=3D"_blank">https://www.ebay.com/itm/3-NO=
S-Champion-NA8-Black-Body-Spark-Plugs-Austin-Healey-100-4-Jaguar-XK120-MG-T=
D/393094267661 </a><br clear=3D"none">><br clear=3D"none">><br clear=
=3D"none">> Cheers,<br clear=3D"none">><br clear=3D"none">> Bob Ha=
skell<br clear=3D"none">> Austin Healey 3000 BN7/BT7 registrar<br clear=
=3D"none">><br clear=3D"none">> On 1/31/21 6:48 PM, Bob Spidell wrote=
:<br clear=3D"none">>> We are running Champion N3C in our BN2; they w=
ork well.<br clear=3D"none">>><br clear=3D"none">>> The shop ma=
nual calls for Champion NA.8 (whatever those are):<br clear=3D"none">>&g=
t;<br clear=3D"none">>><br clear=3D"none">>><br clear=3D"none">=
>> On 1/27/2021 1:16 PM, Michael MacLean wrote:<br clear=3D"none">>=
;>> Not to get too far off the subject about Healeys, but my Harley <=
br clear=3D"none">>>> Davidson (30s technology like our cars) runs=
the best on the <br clear=3D"none">>>> cheapest Ford Autolite 416=
4 copper plugs. I tried "high <br clear=3D"none">>>> perform=
ance" plugs from Harley Davidson and saw no difference. Best <br clea=
r=3D"none">>>> of all they are only 89 cents a piece when on sale =
and I only need <br clear=3D"none">>>> two at a time. Does a=
nyone know for sure which Champion plug works <br clear=3D"none">>>&g=
t; for the BN2?<br clear=3D"none">>>> Mike MacLean<br clear=3D"non=
e">>>><br clear=3D"none">>>> On Wednesday, January 27, 20=
21, 10:18:57 AM PST, Kees Oudesluijs <br clear=3D"none">>>> <<a=
shape=3D"rect" ymailto=3D"mailto:coudesluijs@chello.nl"; href=3D"mailto:cou=
desluijs@chello.nl">coudesluijs@chello.nl</a>> wrote:<br clear=3D"none">=
>>><br clear=3D"none">>>><br clear=3D"none">>>> =
Never had much problems with trouble because of plugs on any of my <br clea=
r=3D"none">>>> vehicles in the past 55 years. The only thing that =
is more or less <br clear=3D"none">>>> important is to gap them, c=
lean them once in a while and replace <br clear=3D"none">>>> when =
they are to far gone. I do not think I even did that in the <br clear=3D"no=
ne">>>> last ten years or so. I have nearly always used Champion p=
lugs as <br clear=3D"none">>>> they are very cheap: between =E2=82=
=AC8 and =E2=82=AC15 for four.<br clear=3D"none">>>><br clear=3D"n=
one">>>> I presume that electronic ignition (Pertronix in my case)=
may also <br clear=3D"none">>>> help.<br clear=3D"none">>>&=
gt;<br clear=3D"none">>>> Kees Oudesluijs<br clear=3D"none">>&g=
t;><br clear=3D"none">>>><br clear=3D"none">>>> Op 27-=
1-2021 om 18:27 schreef Laurie Wilford:<br clear=3D"none">>>> I co=
ntinue to use only Champion plugs in my Healeys but have <br clear=3D"none"=
>>>> experienced at least two episodes of plug problems over the y=
ears. <br clear=3D"none">>>> Based on the number of miles covered =
that is probably not too bad, <br clear=3D"none">>>> but the secon=
d time was with a newly installed set of plugs. One was <br clear=3D"none">=
>>> defective.<br clear=3D"none">>>> Both times the sympt=
oms were intermittent missing both at idle and <br clear=3D"none">>>&=
gt; on the highway. Finally changing plugs was of course one of the <=
br clear=3D"none">>>> last things I did.<br clear=3D"none">>>=
;><br clear=3D"none">>>> Laurie Wilford<br clear=3D"none">>&=
gt;><br clear=3D"none">>>> Sent from my Galaxy<br clear=3D"none=
">>>><br clear=3D"none">>>><br clear=3D"none">>>>=
;<br clear=3D"none">>><br clear=3D"none"><br clear=3D"none">_________=
______________________________________<br clear=3D"none">Support Team.Net <=
a shape=3D"rect" href=3D"http://www.team.net/donate.html"; target=3D"_blank"=
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